Electric-alarm device for clocks



4 Z T m H O S R ELECTRIC ALARM DEVICE POR- CLOCKS. No. 425,004.

Patented Apr. 8, 1890.

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' ELECTRIC ALARM DEVICE FOR- CLOCKS.

No. 425.004. Patented Apr. 8, 1890.

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No. 425,004. Patented Apr. 8, 1890.

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ELECTRIC ALARM DEVICE FOR- CLOCKS. No. 425,004. Patented Apr. 8, 1890.

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" UNITED STATES PATENT OFFICE.

ROBERT SOHMITZ, OF CLEVELAND, OHIO.

ELECTRIC-ALARM DEVICE FOR CLOCKS.

SPECIFICATION forming part of Letters Patent NO. 425,004, dated April 8, 1 890.

Application filed May 20, 1889. Renewed March 12, 1890. Serial No. 343,597. (No model.)

To all whom it may concern.-

Be it known that I, ROBERT SCHMITZ, of Cleveland, county of Ouyahoga, and State of Ohio, a citizen of the United States, have invented certain new and useful Improvements in Electric-Alarm Devices for Clocks, of which the following is a specification.

The object of my invention is to provide a new and improved electric attachment to clocks, by means of which alarms can be antomatically sounded in different rooms .or apartments or buildings at different times, which device can be adjusted for any desired room or apartment and to sound the alarm at any desired time.

The invention consists in the construction and combination of parts and details, as will be fully described hereinafter, and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is a face view of myimproved electric-alarm attachment for clocks, showingadiagram of the connections, parts being broken out. Fig. 2 is averticallongitudinal sectional view of aclock provided with my improved alarm attachment. Fig. 3 is a horizontal sectional view on the line 00 00, Fig. 2. Fig. 3 is a side view of one of the cam-wheels. Fig. .5 is an edge View of the same. Fig. 4 is a face view of the switch-plates and switch. Fig. 5 is avertical transverse sectional view through the same. Fig. 6 is a side and edge View of the spring binding-post. Fig. 7 shows detail sectional views of the contact-piece on the connectingwires.

Similar letters of reference indicate corresponding parts.

The entire apparatus is contained in the wooden casing A, which also contains a clock of any well-known construction. In said casing the transverse shaft 13 is fixed, on which are loosely mounted as many levers O as may be necessary-in this case eight. On the shaft D, parallel with the shaft B, are mounted as many cam-wheels E as there are levers 0, each cam-wheel being provided with a notch E. One-third of the circumference of each cam-wheel is divided into as many equal parts a as there are levers O. The several cam-wheels E are fixed on the shaft D and so arranged that the notch E of each cam-wheel is one subdivision a in advance of the other.

These subdivisions each correspond to half an hour of time, and consequently each successive cam will release its lever O one-half hour later than the preceding cam. One end of each lever O is connected with a spring O, which pulls it upward, and to each l cver an upwardly-projecting guided rod F 1s pivoted, which carries on its upper end a head F of insulating material, upon which rests the free end of a contact-spring G, connected by a screw G with an angle-strip G The several angle-strips G are connected by screws G with corresponding switch-strips 11 on the front of the casing. The spring G is provided with a platinum contact-piece g, and a like platinum piece g is provided above each piece g, and on an angle-piece I, which is connected by screws I with the plate I on the face of the casing. The plate I is connected by a wire J with the battery J, a switch J being arranged in said wire .I for cutting out the instruments. The outer end of the shaft D is provided with a squared head D, to permit of applying a key, by means of which the shaft D and the cam-wheels E thereon can be rotated and adjusted by turning to the right. A pointer K on the outer end of the shaft D moves over a small dial L, and indicates for which time that cam-wheel is set that operates the alarm first, and as the others are set for half an hour later it is an easy matter to ascertain for what time the several cams E are adjusted or set.

A ratchet-wheel M is secured on the shaft D, and is engaged by two spring-pawls N on the cog-Wheel O, which is operated by gearing P from the hour-wheel of the clock, so that said wheel 0 makes one revolution every twenty-four hours. On each switch-plate II a numberof springbinding-postsQare provided,

which serve for receiving the ends of Wires R,

which lead to the different rooms. I11 each room an alarm-bell S and a switch S are pro vided to permit of disconnecting the apparatus.

IV is a switch-board, with which the several wires are c0nnected,to facilitate making connections.

The operation is as follows: If, for example, the shaft D is so adjusted that the alarmbells connected with the first right-hand switch-plate II are operated at six oclock,

the bells connected with the next strip will be operated athalf-past six oclock, and the next following at seven oclock, and so on. The wires leading to the rooms are connected with the corresponding switch-plates according to the time at which the alarms are to be sounded in each room. The cog-wheel O, the ratchet-wheel M, and the shaft D are rotated to the right, and as the open end of the first lever arrives at the notch E of its corresponding cam E it drops into the same, permitting the spring 0 to throw up the other end, whereby the push-rod F presses the contact-piece g on the free end of the spring G against the contact-piece g and closes the circuit between the plate I and the corresponding plate I-I. Thereby all the alarm-bells connected with the said first switch-plate H are sounded. After half an hour the same operation is repeated on the second cam-wheel and all the bells connected with the second switch-plate are sounded, and so on.

The above-described apparatus is operated automatically, and will be found to be of great service in hotels, boarding-schools, and in institutions where a number of persons are to be awakened at certain times by means of alarmbells.

Having thus described my invention, 1'

cuit-closers, and electric alarm-bells connected with the switch-plates, substantially as set forth.

2. The combination, with a clock-movement, of a shaft driven by said movement, a series of cams in different positions on said shaft, a series of circuit-closers operated by the cams, switch plates connected with the circuitclosers, and electric bells connected with the switch-plates, substantially as set forth.

The combination, with a clock-movement, of a shaft driven by said movement, a series of cams on said shaft, a series of circuitclosers operated by the cams, switch-plates connected with the circuit-closers, electric bells connected with the switch-plates, a hand on one end of said shaft, and a dial over which the hand can rotate, substantially as set forth.

4. The combination, with a clock-movement, of a shaft driven by said movement, a series of cams mounted on said shaft, a series of pivoted levers, of which each has one end rested on the cam, a push-rod on each lever, contact-springs on which the. push-rods can act, switch-plates connected with the contactsprings, and electric alarm-bells connected with the switch-plates, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

ROBT. SOI-IMITZ. Witnesses:

FRANZ vOBRIKAT, R. W. GAMML. 

